area code 313

{{Short description|Area codes in Detroit, Michigan}}

File:MI area code 313.png

Area code 313 is a telephone area code in the North American Numbering Plan serving Detroit and most of its closest suburbs in Wayne County, Michigan. It includes the enclave cities Hamtramck and Highland Park, as well as Allen Park, Dearborn, Dearborn Heights, Ecorse, the Grosse Pointe communities, Harper Woods, Inkster, Melvindale, Lincoln Park, Redford, River Rouge, and Taylor north of Goddard Road and east of Holland Road.

History

Area code 313 was assigned as one of the original 86 area codes in October 1947, when it was designated to serve the southeastern quadrant of Michigan, including Metro Detroit, Flint, and the southern part of The Thumb. The rest of the eastern half of the Lower Peninsula was assigned to area code 517.

Because of the demand for new telephone service in Detroit's suburbs and neighboring areas, the northern portion, including Detroit's northern suburbs, Flint and the southern Thumb were split off with new area code 810 on 1 December 1993 with a permissive dialing period that ended on August 10, 1994.{{Cite web |date=1992-11-23 |title=Information Letter IL-92/11-022 |url=https://www.nanpa.com/sites/default/files/planning_letters/IL-92-11-022.pdf |publisher=NANPA}} On 13 December 1997, the remaining 313 area was reduced to its current size when the western portion, including Ann Arbor, Monroe County and western and downriver Wayne County, received area code 734 in another split.

In February 2000, area code 679 was reserved for future numbering relief in form of an overlay complex for the 313 numbering plan area, as part of action for two other overlay plans in the larger Detroit metropolitan area.{{cite web

|url=https://www.nanpa.com/sites/default/files/planning_letters/PL-209.pdf

|title=Planning Letter 209: NPA 679 to Overlay NPA 313 – Michigan

|publisher=NANPA

|date=2000-02-01

|access-date=2025-03-22

}}{{Cite web|title=Michigan Area Codes

|url=https://www.areacodehelp.com/acus/michigan_area_codes.shtml|website=www.areacodehelp.com|language=en|access-date=2020-05-13}} The relief schedule was canceled, however, in April 2000, and implementation of the overlay was suspended.{{cite web |date=2000-04-24 |title=Planning Letter 227: Suspension of Relief in the 248, 313 and 734 NPAs – Michigan

|url=https://www.nanpa.com/sites/default/files/planning_letters/PL-227.pdf

|publisher=NANPA}} Relief planning remained in progress, but 2021 estimates did not expect 313 to be exhausted until 2025.{{cite web|url=https://nationalnanpa.com/reports/October%202021%20NPA%20Exhaust%20Analysis.pdf|title= 2021-2 NRUF and NPA Exhaust Analysis|website=nationalnanpa.com|access-date=2023-04-11|date=2021-10-01}} Opponents of the plan cited the cultural importance and impact of area code 313, in which "313" is often synonymous with the city of Detroit.{{cite news |last=Egan |first=Paul |date=2023-01-19 |title=Michigan is running out of 313 phone numbers, wants to add 679 area code to Detroit area |url=https://www.freep.com/story/news/local/michigan/detroit/2023/01/19/detroit-new-area-code-313-679/69823220007/ |access-date=2023-01-19 |work=Detroit Free Press}}{{cite news |date=2023-01-19 |title=New area code planned for Detroit as '313′ numbers run low |url=https://www.mlive.com/public-interest/2023/01/new-area-code-planned-for-detroit-as-313-numbers-run-low.html |access-date=2023-01-19 |work=MLive |publisher=Booth Newspapers}} On March 17, 2025, the Michigan Public Service Commission announced that area code 679 has been scheduled to be in-service in an overlay with 313 on November 7, 2025,{{cite web

|url=https://www.michigan.gov/mpsc/commission/news-releases/2025/03/17/new-10-digit-dialing-requirement-coming-for-phone-customers-in-michigans-313-area-code

|title=New 10-Digit dialing requirement coming for phone customers in Michigan's 313 area code

|date=2025-03-17

|access-date=2025-03-22

|publisher=MIchigan Public Service Commission

}}{{Cite web

|last=Rahal |first=Nour |title=As 313 phone numbers run out, metro Detroit to transition to 10-digit dialing on Oct. 7 |url=https://www.freep.com/story/news/local/michigan/2025/03/17/detroit-area-313-area-code-phone-numbers-679/82493513007/

|date=2025-03-17

|access-date=2025-03-22

|website=Detroit Free Press |language=en-US}} which is the earliest date of central office code activation possible, given that all prefixes in 313 have been assigned. However, the exhaust date of NPA 313 is projected for the fourth quarter of 2027. A permissive ten-digit dialing period for 313 is scheduled for April 7, 2025 through October 7, 2025.{{cite web

|url=https://www.nanpa.com/sites/default/files/planning_letters/PL-618.pdf

|title=NPA 679 and 313 All-Services Overlay (Michigan)

|publisher=NANPA

|date=2023-07-13

|access-date=2025-03-22

}}

See also

References

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